Gearóid Mac Cuinneagáin wrote (in a message directly to me):
> You wrote that Neamh might be either 'Heaven' or 'penis', but that neither
> really fitted with the meanings of the other two names. What about 'nimh',
> poison? Would the OI word fit in this context?
Excellent! The usual OI spelling of "nimh" is "neim", which might
well account for the name "Nem". The range of meaning in OI is
"venom, poison; bane, malefic power; virulence".